Micrometer tool



C. J. NOEL MICROMETER TOOL Nov. 15, 1949 Filed 001'. 2, 1947 Patented Nov. 15, 1949 UNITED STATES PATENT OFFICE MICROMETER TOOL Clarence J. Noel, Indian Orchard, Mass.

Application October 2, 1947, Serial No. 777,535

3 Claims.

This invention relates to improvements in measuring apparatus and is directed more particularly to improvements in micrometer tools.

The principal object of the invention is the provision of a micrometer tool for measuring diameters within a wide range of dimensions.

The tool of the invention is adapted for many and various uses but is particularly adapted for use in measuring the inside diameter of cylinders and the like.

In the boring of cylinders and the like where a boring bar is used and extends into the cylinder, it is necessary during the boring operation to frequently check the diameter and the tool of this invention is adapted for that purpose.

It is only possible with prior art micrometers to measure diameters within a narrow range but according to this invention, it is possible by the novel construction to measure diameters within a very great range. I I

With the foregoing and various other novel features and advantages and other objects of my invention as will become more apparent as the description proceeds, the invention consists in certain novel features of construction and in the combination and arrangement of parts as will be hereinafter more particularly pointed out in the claims hereunto annexed and more fully described and referred to in connection with the accompanying drawings wherein:

Fig. l is. a side elevational view of a micrometer tool embodying the novel features of the invention;

Fig. 2 is a side elevational view of one of the collars for the tool shown in Fig. 1; and

Fig. 3 is a side elevational view of one of the holders of the invention.

Referring now to the drawings more in detail, the invention will be fully described.

A frame 2 is provided which is preferably of 6 form and has hubs 4 and 6 at opposite ends thereof.

The hub 4 is provided with a bore 8 adapted to receive the inner shank end ID of a stem I2.

A collar or spacer I4 is bored to slip over the part Ill and is adapted to abut the hub 4. The stem !2 has an intermediate portion l providing a shoulder 8 for abutting the member M.

A look screw 26 in threaded engagement with the hub 4, as shown, is adapted toengage and hold the stem in place in the hub.

The hub 8 is provided with a bore 22 and a relatively smaller bore 24 which are in accurate axial alignment with the bore I0.

A holder 38 is provided which has a part 32 receivable in the bore 22 of hub 6.

A clamp screw 34 in threaded engagement with the hub 6 engages and clamps the part 32 of the holder in the bore 22 thereof.

A micrometer 38 has a body 38 which is receivable in the bore 22 of the holder and is provided with a spindle 4i!v which is receivable in a bore provided in the body and the bore 24 of hub 6.

A thimble member 42 of the micrometer 36 is rotatable relative to the body 38 thereof as is usual in micrometer construction for measuring purposes and graduations 4'4 and 46 are provided on said body 38 and member 42 A clamp screw 44 in threaded engagement with the holder engages the micrometer body 38 tohold it in place.

Markings on the hub 6, holder 32 and body 38 as shown at 48, '50 and 52 and are provided so that the parts may be accurately related.

Outer end faces 54 and 56 on outer ends of members !2 and 42 are adapted for engaging inner surfaces of a bore to be measured.

With the parts arranged, as shown, the tool of the invention may be inserted in. a cylinder being bored for measuring the diameter thereof. The frame is formed so as to not interfere with the boring bar in the cylinder.

There may be other spacers and holders 60 and 62 such as shown in Figs. 2 and 3. These may be of different lengths and used as may be desired for measuring diameters within a wide range.

A micrometer of itself is not ordinarily capable of measurements within a very narrow range but by providing a plurality of collars and holders in connection with the frame the narrow range of the micrometer is made use of through a very wide range.

Altogether it is possible to measure the diameters of cylinders and the like which vary in diameter through a great range.

The invention may be embodied in other specific forms without departing from the essential characteristics thereof. Hence, the present embodiments are therefore to be considered in all respects merely as being illustrative and not as being restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all modifications and variations as fall within the meaning and purview and range of equivalency of the appended claims are therefore intended to be embraced therein.

What it is desired to claim and secure by Letters Patent of the United States is:

in threaded engagement therewith for engaging the shank of a stem, a stem having a shank at one end thereof disposed in said bore and having a shoulder intermediate its ends and an end face on its ,other end, ,coll ar means disposed between said SljlglllQfll-Z ofithggstem and outer face of said one hub, the other of said hubs provided with a bore for receiving a holder and a second bore -fgr receiving the spindle of a micrometer, the bores of said other hub in axial alignment with the and aligned hubs at opposite ends thereof which are provided with outer transverse faces, one of said hubs provided with an axial shank bore and having a clamp screw in threaded engagement therewith for engaging the inner shank of a stem in said bore, an elongated stem having an inner shank at one end thereof disposed in said shank bore and having a shoulder intermediate its ends u s gemt eout eeeq -se d onahubtand with ann u er e d e s inelitom t eapu e face of said one hub, a' collar on said shank between said ,,shoulder and outer face of said one hub, the other of said hubs provided with a holder bore extendciing'c'rinwardly from the outer face thereof and bore of the first named hub, a screw in threaded with a relativ ly small r pin re x n i engagement therewith for engaging a holder, inwardly therefrom, the bores of said hubs being holder means receivable in asaid holdenbore and! uniaicialiali n-ment, a holder in said holder bore having a bore therethrough, and a micrometer I having a body mounted in said holder and a memextending from the outer face of said last-named 'huband having an outer face, a clamp screw in l shbulg n.

v,Jaer rotatable thereon having an outer end face. t e d d en agement with said other hub enga 'A mierbmgt'eraar of the class described aid h0l r, 'a d h er provided with a comprising in combination, a frame in the form f i e b y bo e-Extendi g inwardly qm bf 'ia Elna/mints a posite ends' thereof, one a -o tr-fiaee thereof andw th-a rela y mall "ti said hubs provided w th a bore and a screw 'l fd d d n -inwa y om sa d in threaded fl hthf r engaging 25 b'ores of-the holder being in axial alignment with "Yfig ghfigfbf d ag gm at a shank at those of the-said othershub, a clamp screw in nsaidbdreand having .,.'threaded.' engagementwwithu'said otherthub". eni i m a fj a n end face rzgageablel with said. holder, a micrometer having ion "itslotherendfcollarlmeans disposed between a body and a spindle diswsedhinsthe: dysaid should'enof the .stem and outer face of said spindle bUreS of the holder thimbr rdtatably :mOunte'd on said mic-rbm'eterbodyia clamp screw ,lln e tefs other -.ass1a mshh wz ta ahl. h A l V end face, said collar means including a plurality e hub; the other of said hubs provided with a I bgre 'for rece ivingja holder and a second bore for receiving the jspindle,oflamicrometer, the hub, in, axial alignment with e bore-o, e .amed h la, a screw. in

: r s ,l threaded engagement therewith for, engaging.,a q hglgiq holder,gneans, receivable in said holder vP raa q ban er a therethrough, and a micrometer having body mounted said holder e -1.3 99 havin a Outer of members provided with bores for receiving said tion, a frame in ,theform of-a 0 having spaced incthreaded .engagement'with said holder engage- .able 'with' the body of "the micrometer, and said CLAlRtENCE J. NOEL.

{RE ER NCES crrEo UNITED q m'es'tlfisis i .Number Name 7 Date 1, 1,419,837 Flach'skampf June 13, 1922 5 1575,0663 Gregory Nov. 20, 1923 

